1select @@global.report_port;
2@@global.report_port
3DEFAULT_MASTER_PORT
4select @@session.report_port;
5ERROR HY000: Variable 'report_port' is a GLOBAL variable
6show global variables like 'report_port';
7Variable_name	Value
8report_port	DEFAULT_MASTER_PORT
9show session variables like 'report_port';
10Variable_name	Value
11report_port	DEFAULT_MASTER_PORT
12select * from information_schema.global_variables where variable_name='report_port';
13VARIABLE_NAME	VARIABLE_VALUE
14REPORT_PORT	DEFAULT_MASTER_PORT
15select * from information_schema.session_variables where variable_name='report_port';
16VARIABLE_NAME	VARIABLE_VALUE
17REPORT_PORT	DEFAULT_MASTER_PORT
18set global report_port=1;
19ERROR HY000: Variable 'report_port' is a read only variable
20set session report_port=1;
21ERROR HY000: Variable 'report_port' is a read only variable
22